Shore



March 15, 1932. R. NEWTON SHORE Filed Maron 17, 1930 Patented Mar. 15, 1932 UNITED STATES ROBERT I.NRWTON,IOF`1IANSAS CITY, MISSOURI, vAssIerNOR, BY DIRECT AND MRSNE lASSIGNMENTS, j MISSOURI To SOUTHWESTERN SHORE, COMPANY, CORPORATION 'OF SSHORE a Applica/maaien March 17, 41930. sriaiNo; 436,523. Y

This invention relates to shores and more especially to shores of the extensibletype and consisting of slidable lower and upper, members and means whereby the weight of the 5 upper member and the load thereon serve as the medium whereby said member is held at the desired point of adjustment relative to the other or lower member, and my Objects are to produce a shorebelonging tothe genw eral class mentioned which is of very simple construction and easily operated, consists of but few parts, and whichl furthermore, while very eflicient in its gripping'action can be H instantly ungripped. Y Y

- With these objects in view, theinvention consists in certain novel and useful features of construction and combinations of parts vas hereinafter described and claimed; and ,in order that'itl may be fully understood, refer- 20 ence is to be had tothe accompanying drawings, in which:4 a v Figure 1 is a fragmentary elevational view of a shore embodying the invention'.

Figure 2 is a horizontal section on the vline 5 Irn 0f FigureV 1.

lFigure 3 is a vertical section on the line Illy-III of Figure l, but vwith the lower or inner member indicated inelevation. r

Figure 4 is' a fragmentary perspective view parts ofthe appliance; o i v Referring to the'drawings in detail, 1 indicates the lower or inner'member adapted to standupon the ground o'rother support', and usually provided with an enlarged foot or i 35 base, not shown. In ythis instancethe mem- 'ber 1 isr shown as of tubularcylindrical form,

and it'ting'slidinglyupon it is an upper tubular member 2 sothat relative telescopic action mayl occur for, purposes of "shortening or n lengthening the shore;

` 4The lower end ofthe member 2 is threaded as at 3 and engaged with a cylindrical nut 4, Vand Asaid nut is provided with handles 5 so `that when properly supported, it may be 45 readily turned by hand to effect upward movement of the member 2 until pressed tightly against the under side of a beamor the like,

not shown, for carrying 'a load. f

The nut 4 is provided atits lower end ai) 1with a circumferential flange "6, and rests side`with teeth 2() to biteV uponA theV lower member 1, and saidfjaw is provided with ya upon acollar 7 lfitting snugly around or 'uponV member1, and 'said collar is provided with a pair lof diametrically-opposite hooks 8 vwhich t over the flange. 6 of the nut.- TheJVA collar is provided with a bifurcation9, which in width is' somewhat less than the diameter of the member 1, and isprovided at ythej'side margins of the said vbifurcations witha pair of laterally-projecting and'preferably paralj lel lugs 10 and 11, lug 11 being Vshown as 'do slightly longer than lug 10, and said lugs g areprovided with slots or elongated Openings 12` and l'respectively, the latterfslot or open'- ing being the longer, and engaging said slots or openings'is a'wedge-shaped clamping key, consisting of ytwo cylindrical portions-Hand 15, and the small end ofthe key has anv end piece 17 Aforming shoulders for 'the adjacent end of the web. The slots 12and 13 crosssectionally conform to the key, thatis to say, are reduced 'inl width centrally so as to form ribs 18- spaced aparta lesser distancethan the width of the end piece 17, so that the *keyv when driven back, thatis in the direction indicated by the arrow in Figure 2,-willvbe '75v arrested by. the'engagement of the end piece heavy Vblow is necessary on the small endofsot i the `.key to driveV it back when it is desired tov withdraw the shore from under aheavy load,

Fitting in the-bifurcation betweenthe lugs 1,1 and 12 is a segmental jaw 19,;the same being of hard steel and provided at its inner slot 21 which is fitted with reasonable snugness upon inner portion 14 ofthe key.- Toso assemblethe wedge and jaw it vis necessary to slip the wedge endwise into the jaw before the end piece 7 is applied to the wedge, asl it is desirablev that the latter when driven `back shall effect `withdrawal movement ofthe jaw from member 1." For this reason the outer es or open side of the slot 21 isnarrower than the diameter of the inner member ofthe key, as 'clearly shown by Figure 3; Of-course, shoulders. can be formed ontliesmall end of the key by upsetting such end,inli`eu of theV '17, withthe Said ribs. This retains thekey end piece 17, and in the manufacture in quantity, this method of providing against dislocation of the key is contemplated as less expensive. After the key is once in place there will be no necessity for removingit. It is subjected to no strain likely to fracture it. Y

Assuming that the shore is in shortened condition and is placed under a beam or the like to afford support for a load on such beam, the operator grasps handles 5 and pushes upwardly thereon, this action slidingthe upper member and the collar 7 and jaw 19 in the same direction, and it will be noted by reference particularly to Figure 3, thatin the initial part of this movement the upward pressure of .the lugs 10 and 11 on the outer por-v tion 1.5 of the key, tends to rock said portion of thekey slightly upward with .the inner portion as the center of such movement, this being true because there issome play of the key in the slots 12 and 13. In consequence of this movement 4any pressure of the jaw v19 on the lower member 1 is relaxed and consequently the Vjaw offers no material resistance to the upward sliding movement. When the upper end of the member 2 is arrested by contact with theoverlying beam, the upward lthrust l on the handles is relaxed, and the tendency of the upper member to slide downward at this time, reverses its pressure on the key and thus tends to rock the outer'portion 15 of the key downwardly'and thereby tends toL bring the vaxes of the portions 14- and 15in the same horizontal plane. .The result of this action is to thrust. the jaw forcibly against the Amember 1 and arrest-the downward movement of member 2. The operator may then grip the handles of'and rotate the nut which, through Yits threaded engagement` with member 2,

forces thelatter tightlyagainst the overlying beam, the pressureof the jaw on member 1' inlthis action being intensified and thereby Vguarding against downward movement of the sleeve and the parts supported thereby. When the parts have been thus arranged,.the operator drives or advances the wedge-shaped key by'means of a hammer or otherwise and thus forces the liaw further inward against member 1 so that the teeth of the former shall slightly indent the latter. The load imposed upon the beam is transferred to member 2,' and consequently the toggle relationship between the key andthe jaw increases the lpressureof thelatter against member 1, it being understood in this connection that the parts will be so proportioned that it is never possible for the inner portion 14 of the key to pass beyond the level of the portion 15, and as a result any increase of the load cannot effect relaxation of the grip of the jaw on ymember 1.

It will furthermore be observed that when the shore is tobe removedfrom its supporting position, it is only necessary to drive the y wedge backward by means of arhammer or otherwise, and this action through the outward pressure lof the portion 14 ofthe key on the jaw, effects out-ward movement of the latter and thus permits the upper member 2 together with the nut sleeve and jaw to slide downward upon member 1.

From the above description it will be apparent that I have produced a shore em- 'bodyingv the features of advantageV set `forth as desirable inthe statement of thevo'bjects Vof the invention, and while I have illustrated Y tween )said lugsv and lagainst the. member within the collar, Yand a tapered key extending through the slots 'of said lugs and interlocked with and forming a support for said jaw-.to edect pressure of the latter against p thexengaged ymei-nicer and prevent sliding movement of. the 'other member tending to shorten the shore. f j

' 2. A shore comprisingtwo members fitted slidably together, a collar fitting slidingly on one member and underlying the other` to sustain the latter and provided with laterally-projecting slotted lugs, a j awfitting vbetween/said lugs. and against the member within the collar, and a tapered key extending thro-ugh the slots of said lugs and interlocked with and forming a support for said jaw to effect pressure of the latter against the engaged member and prevent sliding movement of the othermember tending to Y shorten the shore. and provided at its narrow end with a shoulder toabut the collar and hence avoid vchance of` dislocation from th-e lugs.

3. VA shore comprising two members fitted slidably together, a collar iitting'slidingly Y on one member and underlying the other` to sustainthe latter, and provided with later- 'ally-projecting slotted lugs, a jaw fitting between said lugs and against the member within the collar and provided with a transverse slot having a constricted mouth, and a tapered key fitted slidably in the slots of the lugs and inthe slot of the jaw and adapted vwhen moved endwise in one direction to efy feet clamping pressure of the aw on the member within the collar and when moved in tbe other direction to kwithdraw the jaw from `the said member.

4. Aeshore comprising two members itted slidably together, a. collar iittin slidingly on one member and underlying t e other to sustain the latter, and provided with latery ally-projectng lugs provided with slots, one of which is of constrieted width intermediate itsy length, a vkey comprising two cylindrical converging Vportions and a connecting web portion of less thickness than the converging portions,Y said key extendin through said slotsand capable of longitu inally slidable and a slightvro'oking movement therein, a jaw '1 fitting between `said lugs and against the member within said collar and provided with a transverse slot receiving the adjacent cylindrical portion of the key through relativey lateral movement ofeither, the jaw and key constituting a toggle tending to straighten under the weight o the member overlying the collar and thereby effect clamping of the jaw against the other member, the advance of the key serving `to intensify the pressure of the jaw against the engaged memberv and reverse movement of the key, Vto relax or removevsuch pressure.

In testimony whereof I aix my signature.

, ROBERTv I. NEWTON. 

